Simon, what is going on with this one ? Lots of people are complaining and you have obviously lost track of this issue. I expect Adobe to cure the bug as right now I am paying for a product that ain't work properly. I have waited for a long time now and honestly speaking my patience is coming to an end.

Simon, can you or any other employee please take care of this and respond to this post. It is now 5 months ago that I posted this problem and nothing happened. This is extremely frustrating. Dec-21-2018

Do you see any render difference by toggling the details panel on or off? When Lr renders the image at less than full resolution (1:1), the rendering of the Details panel settings including sharpening would be an approximation. Can you share a copy of such photos plus the settings online?

Sorry I took a day off last Friday and lost track of this thread. Are these preview discrepency shown in the library module or the develop module? I can sort of envision it could happen in the library module. Essentially when in the library module, for performance reasons, Lightroom would only render necessary sized preview that fulfills the windows image drawing request. If the standard preview size (Lightroom>Catalog Settings>File Handling>Standard Preview Size) meet the image display needs, it would not try to render the 1:1 preview instead. This depends on factors such as this standard preview size settings, your negative size and the image display size. The fact that you zoom to 1:1 and it becomes sharper is because when zooming to 1:1, Lightroom forces the rendering of the 1:1 previews.

Johan's reports seem to center around switching from the develop module to the library module and the preview in the library does not always update with the new settings (such as dehire) right after the module switch. His issue is still under investigation and we haven't been able to reproduce it yet (I could not either).

1. my preview size setting is 1:1, so there is nothing to increase. By testing different options I found out that if convert images into dng files during import LR accepts my selection regarding the preview setting. If I import images in the Canon file format CR though, LR always creates 1:1 previews regardless of what I choose.

2. yes, this is an option, especially when 1:1 previews have been discarded after a while ( in my case 30 days )

3. I am using the max and best display resolution already. Apart from this it seems to me that display resolution is not relevant because images are sharp when they are rendered 1:1 which indicates the issue is software related.

In the past I have been using the dng format and the standard previews. Only lately I started to import in the CR file format. Also I have been working on images older than 30 days which explains unsharp previews.

So far so good and I guess I know what to do in the future.

But now comes something strange. With all my testing I did today I figured out that 1:1 images are sharper in the Library Module than in the Development Module. Something I did not notice before. Have you heard of that before ?

I shot an image of the spines of some books which shows nicely what I said and I am enclosing 2 pdf of the image in Library and Development Module. It is not an awful lot of a difference in image quality but it is clearly visible.

I figured out that if I have a 1:1 preview ( sharp ) and work on it in the development module it is unsharp after switching from development back to library module.This is exactly the same what Johan described and it is very frustrating. I then have to zoom in and out to get it sharp.

i have found a few scenarios where (for me, 2nd monitor) the photo does not fully render unless you do something to it. the 2nd monitor will show a less than sharp photo, so i do a quick + then - (brightness up and down) and then it snaps into place. I have found other cases when doing autosync on multiple photos that only the first photo gets adjusted but the others don;t unless "touched" (for example, running a cursor over them in the filmstrip at the bottom of the screen).

I use Canon 5dmk4 and when I load RAWs, most of them come "soft". Those made with shallow depth of field. If I use big apertures, like f1.8, I need to zoom in, wait for it to completely load (slow) and only then when I zoom out to fit my screen I will have perfectly sharp image.

So steps to produce this:

1. Load any shallow DOF image2. Normal screen size, relative to the monitor is not sharp. It looks kind of soft with difficult to predict where the focal point is.3. Zooming to 100% renders the image entirely and nicely. But it's a very slow process.4. Zooming out and having full image on the screen is finally tack sharp.

Any ideas? It wasn't like that before. I remember LR rendering any screen size nicely and sharply even before going to 100%. So either they changed the rendering, some settings or it's a bug.

The issue happens very often but not always. Lightroom shows low resolution image after changing settings (see the screenshots). If I change current image twice or even click on the same image on the ribbon, then it shows the correct image. The issue is so annoying that I'm going to stop using Lightroom just because of it. Please fix it as soon as possible!

There’s a workaround (re-install lightroom, reset settings, discard previews and rebuild previews) but it only works in Windows.

I’ve recently purchased a MacBook Pro and have been struggling with this since. The previews used in the library look very low quality. Especially on darker images and shadow areas. Zooming in at 1:1 or more does render a full quality preview in develop but not in library nor on slideshows.

I can see that this thread as been marked as “in progress” but does this mean that the issue has been identified and a fix is on the way? Any idea of when this will be out?

This problem also happens when using the full screen display option (F key) and zooming in and out in the full screen image. Sometimes, after zooming out, the full screen image is displayed in low resolution.

Same here! This issue has been around for a long time but no fix has been released despite all the user reports. Another update and still no fix to this issue is just nonsense. What’s the point of having a high megapixel camera and screen to look at low quality pixelated images all the time?!? I am so frustrated that I have started looking at other options. I’ve still got around 6 months left on my Adobe subscription but I am at the point where I no longer care. I just want what I am paying for... a software that actually works!

It is a new post of the old bug report (many threads existed) as "Lightroom Classic: Images not sharp unless I zoom in and out". Adobe says it is 'in progress' since months but still latest LR Classic 8.1 did not fix the issue:Regardless of config settings, in Library and Slideshow modules the loupe view/fullscreen views show crappy images not rendered with full resolution instead showing lots of banding artefacts. Develop mode is working well (was not always the case).This way, Library and Slideshow modules are completely useless. This issue exists since a few versions as the other threads mention. I don't want to repeat but still request fixing this issue.

Argggggg, it is getting worse again instead of Adobe fixing this issue. Latest LR update did not solve the issue in Library mode again, and now the issue is back in Develop mode, to a little less degree disturbing than in Library mode but still also there, high quality images are shown only ONLY OOONNNLLYYY after manually zooming in and out again.

PLEASE TAKE THIS ISSUE SERIOUS instead of adding more features !!! Adobe: please comment about progress in solving this issue.

Attached three images: a) banding in Library mode, b) banding in Develop mode c) high quality image in Develop mode after zooming in and out again.

It is really annoying and I don't understand the company policy of Adobe who don't fix this. An image processing software that delivers no sharp images is an absoluteno go. Maybe we should consider suing them for cheating customers as their software doesn't delivery what they promise.